* amd/sun_map_parse.y: instead of using a custom FOO_alloc()

* amd/sun_map_parse.y: instead of using a custom FOO_alloc()
function, use Amd's CALLOC(struct FOO) macro.

* amd/sun_map.h: remove extern definitions to functions no longer
needed.

* amd/sun_map.c: removed superfluous *_alloc() functions, some of
which caused conflicts with same-named symbols in the parser
(since we rename 'yyalloc' to 'sun_map_alloc').